I recently had to build an infrared close proximity sensor that could tell if something was dropped in a parcel delivery drop box. After some searching, I ended up using a microcontroller and a piece ...

The robot uses a whopping 32 IR sensors to follow a black line across a concrete workshop floor, adjusting its path using a steering motor salvaged from a power wheelchair. An Arduino Mega Pro ...

If you have a few hours spare and fancy creating a new Arduino project ... in this fun Arduino infrared touchscreen music controller which has been created by Instructables user amandaghassaei.